Below you will find pages that utilize the taxonomy term “Raspberry Pi”

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Raspberry Pi RFID RC522 wiring

getting rfid rc522 to work with raspberry pi 2

Image from https://raspberrypi.stackexchange.com/questions/37021/.

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Raspberry Pi 2 B GPIO Layout

Expansion Header

Pinout

Images from http://pi4j.com/pins/model-2b-rev1.html.

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Running Overclocked Raspberry Pi 2 B With FreeBSD

Running Overclocked Raspberry Pi 2 B With FreeBSD

Overclocking options: arm=1000MHz, core=500MHz, sdram=500MHz, overvolt=2

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Write an FreeBSD.img file to an SD card

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# plugin your sd card
# open a terminal as root/sudo
diskutil list // identify the /dev/diskNUMBER of the sd card
diskutil unmountDisk /dev/diskNUMBER
sudo dd bs=1m if=FreeBSD-11.0-CURRENT-arm-armv6-RPI-B-20150217-r278908.img of=/dev/diskNUMBER

How to build your own freebsd raspberry pi (arm6) image:

Update 2018-08

FreeBSD has supported the Raspberry Pi 2 since Q2 2015.

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FreeBSD reboot 10 seconds after a panic

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echo 'kernel.panic = 10' >> /etc/sysctl.conf
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// kern.coredump=0
// kern.corefile=/dev/null
// background_fsck="NO" # on zfs ;)
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Overclocking Raspberry Pi B+

SoC (Broadcom BCM2835 ARMv6) thermal range is up to +85 °C.

Orginal /boot/config.txt:

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disable_commandline_tags=1
gpu_mem=32
device_tree=rpi.dtb
device_tree_address=0x100
kernel=uboot.img

My additional options (stable system):

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arm_freq=900
arm_freq_min=700
gpu_freq=250
gpu_freq_min=250
core_freq=450
core_freq_min=250
sdram_freq=500
sdram_freq_min=400
over_voltage=0
over_voltage_min=0
initial_turbo=15
temp_limit=75

Based on http://elinux.org/RPiconfig#Overclocking_options.

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Setup swapfile on FreeBSD

Your process consume more memory than there is physical RAM (e.g compelling on a raspberry pi)? In that case you need swap space.

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dd if=/dev/zero of=/swapfile bs=1m count=512
chmod 0600 /swapfile
echo 'md99            none            swap sw,file=/swapfile  0 0' >> /etc/fstab
reboot
swapon -aLq
swapinfo
swapctl -lh

Based on:

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Fix FreeBSD 10.1 Boot Problem On Raspberry Pi B+ (error 19)

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echo 'hw.bcm2835.sdhci.hs="0"' >> /boot/loader.conf
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